boxes for top hats?

[tsuki-no-bara.livejournal.com]

i have a top hat that i want to take on vacation in october, but short of wearing it on the plane i'm not sure how to get it there uncrushed. i don't really want to pack it in my suitcase unless i absolutely have to. are there places i can buy a hatbox for it, so i can carry it on the plane in relative safety? i have a car so it doesn't necessarily have to be a t-accessible place.